linux-kernel - [PATCH] LoongArch: Make compute_return

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Message-Id: <1655541551-3997-1-git-send-email-yangtiezhu@loongson.cn>
Date:   Sat, 18 Jun 2022 16:39:11 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>
Cc:     Xuefeng Li <lixuefeng@...ngson.cn>, linux-kernel@...r.kernel.org
Subject: [PATCH] LoongArch: Make compute_return_era() return void

compute_return_era() always returns 0, make it return void,
and then no need to check its return value for its callers.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/loongarch/include/asm/branch.h | 3 +--
 arch/loongarch/kernel/traps.c       | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/loongarch/include/asm/branch.h b/arch/loongarch/include/asm/branch.h
index 3f33c89..9a133e4 100644
--- a/arch/loongarch/include/asm/branch.h
+++ b/arch/loongarch/include/asm/branch.h
@@ -12,10 +12,9 @@ static inline unsigned long exception_era(struct pt_regs *regs)
 	return regs->csr_era;
 }
 
-static inline int compute_return_era(struct pt_regs *regs)
+static inline void compute_return_era(struct pt_regs *regs)
 {
 	regs->csr_era += 4;
-	return 0;
 }
 
 #endif /* _ASM_BRANCH_H */
diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c
index e4060f8..1bf58c6 100644
--- a/arch/loongarch/kernel/traps.c
+++ b/arch/loongarch/kernel/traps.c
@@ -475,8 +475,7 @@ asmlinkage void noinstr do_ri(struct pt_regs *regs)
 
 	die_if_kernel("Reserved instruction in kernel code", regs);
 
-	if (unlikely(compute_return_era(regs) < 0))
-		goto out;
+	compute_return_era(regs);
 
 	if (unlikely(get_user(opcode, era) < 0)) {
 		status = SIGSEGV;
-- 
2.1.0